Capture Card - Recording to file

[axiomx11]

Evironment: WinXP, Videolan 0.8.5, Osprey 50 USB capture card

Instructions I am using:

http://wiki.videolan.org/index.php/How_ ... pture_Card


This does not work for me. When I try the command as given I get:

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Unable to open 'v4l://' Unable to open ''--sout=#transcode{vcodec=mp1v,vb=2030,audio-sync,acodec=mpga,ab=192,channels=2}:std{access=file,mux=mpeg1,url=out_file.mpg}''

When I change it to this:

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vlc dshow:// :v4l-norm=1: '--sout=#transcode{vcodec=mp1v,vb=2030,audio-sync,acodec=mpga,ab=192,channels=2}:std{access=file,mux=mpeg1,url="out_file.mpg"}'

It shows the video in the window, but does not save any file.

When I try doing it with the gui (I think the commands it uses are these):

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dshow:// :dshow-vdev="" :dshow-adev="" :dshow-size="" :sout=#duplicate{dst=std{access=file,mux=ts,dst="C:\Documents and Settings\bkrohne\Documents\Resources\dvd4.mpg"}}

It does not show the video, but it does save a 1k file.

If I select raw output, it makes very large files, but videolan cannot play them.


I read something about some capture stuff only working under Linux. Is this what is happening to me?
http://www.videolan.org/doc/streaming-h ... /ch10.html

[DJ]

It would be necessary to know what your card was putting out (source) to suggest a format and container for the transcode.

Press ctrl i while using the capture device and go to the advanced options tab. The format in use will be shown here. The documentation may give some indication as to what the container is i.e. mpeg, mpeg4, raw etc.

[axiomx11]

Ok, I see that it is using the I420 codec.

So I tried this command:

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vlc dshow:// :dshow-vdev="" :dshow-adev="" :dshow-size="" sout=#duplicate{dst=std{access=file,mux=I420,dst="clip.I420"}}

Which shows no video, and saves a 1k file.


Then I tried this:

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vlc dshow:// :v4l-norm=1: '--sout=#transcode{vcodec=i420,vb=2030,audio-sync,acodec=mpga,ab=192,channels=2}:std{access=file,mux=i420,url="out_file.i420"}'

Which shows the video and saves no file.

[DJ]

I420 is a Chroma format and may be considered raw video. In this case you will need to transcode the source into a real format and container.

The commands should look something like this:

:sout=#transcode{vcodec=DIV3,vb=768,scale=1,acodec=mp3,ab=128,channels=2}:duplicate{dst=std{access=file,mux=asf,dst="C:\Documents and Settings\Owner\My Documents\My Videos\Test.asf"}}

[axiomx11]

Thanks that worked!

Excellent.

[axiomx11]

Ok so recording works, now I am trying to stream this accross the network.


First I tried my usual methods:

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vlc dshow:// :v4l-norm=1:sout=#duplicate{dst=display,dst=std{access=udp,mux=ts,dst=224.0.0.0:1234}}

Plays locally, nothing remote

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vlc dshow:// :v4l-norm=1:sout=#duplicate{dst=display,dst=std{access=udp,mux=asf,dst=224.0.0.0:1234}}

Tried using asf, plays locally nothing remote

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vlc "test.asf" :sout=#duplicate{dst=display,dst=std{access=udp,mux=ts,dst=224.0.0.0:1234}}

Works fine, after short artifacts, local and remote.


I am getting the thought that I need to transcode this somehow:

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vlc dshow:// :sout=#transcode{vcodec=DIV3,vb=768,scale=1,acodec=mp3,ab=128,channels=2}:#duplicate{dst=display,dst=std{access=udp,mux=ts,dst=224.0.0.0:1234}}

This shows nothing on both local and remote.

[DJ]

Considering transcoding is required for streaming and creating a file is the same as streaming other than where you are sending it, I'm not quite sure why you want to change something that worked in your last post???

Didn't you understand why it didn't work before or what was done to make it work?

[axiomx11]

Sorry I can be a little dense at times.

Anycase, I looked at it again (of course you have to transcode!), and got a command that works:

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vlc dshow:// :dshow-vdev="" :dshow-adev="" :dshow-size="" :sout=#transcode{vcodec=DIV3,vb=768,scale=1,acodec=mp3,ab=128,channels=2}:duplicate{dst=display,dst=std{access=udp,mux=ts,dst=224.0.0.0:1234}}

[DJ]

Cool! Please remember that MPEG TS will work but won't be compatible (using the DivX format) to anything other than VLC. Most programs commonly associate MPEG TS with MPEG 2 or some will allow H.264.